console 命令行工具 X clear
console
<DOCTYPE htm1>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device,initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <table border="1">
        <caption>课程表</caption>
     <tr>
     <th>星期1</th>
     <th>星期2</th>
     <th>星期3</th>
     <th>星期4</th>
     </tr>
     <tr>
         <td>语文</td>
         <td>数学</td>
         <td>英语</td>
         <td>生物</td>
     </tr>
     <tr>
        <td>语文</td>
        <td>数学</td>
        <td>英语</td>
        <td>生物</td>
    </tr>
    <tr>
        <td>语文</td>
        <td>数学</td>
        <td>英语</td>
        <td>生物</td>
    </tr>
    <tr>
        <td>语文</td>
        <td>数学</td>
        <td>英语</td>
        <td>生物</td>
    </tr>
</body>
</html>